Locking means for hatch covers



June 26, 1934. J. w. lsHERwooD Er AL 1,964,203

LOCKING' MEANS FOR HATCH COVERS Filed Dec. 8. 1932 5 Sheets-Sheet 1 @A f4 /ll l u /T M M N f M/w/W fu z 2 z L@ 2 Q n gmc/whom June 26, 1934. J.w. lsHERwooD Er AL 1,964,203

LOCKING MEANS FOR HATCH COVERS Filed Dec. 8, 1932 5 Sheets-Sheet 2 /5HMMMMIH gmc/Miou Jose/v7: W [572e rwood ViZZz' 2 m .[serwooc? June 26,1934.

LOCKING MEANS FOR HATCH COVERS Filed Deo. 8. 1932 5. Sheets-Sheet 3 J.w. lsHERwooD Er AL 1,964,203

lJune 26, 1934.

J. w. lsHl-:Rwoon ET AL 1,964,203 LOCKING MEANS FOR HATCH COVERS FiledDeo. 8. 1952 5 sheets-sheet 4 2 A Y Josep Wfs-rerwood m m William[Sherwood June 26, 1934 J. w. isHERwooD m' AL 1,964,203

LOCKING MEANS FOR HATCH COVERS Filed Deo. 8. 1932 5 Sheets-Sheet 5CMM/wma Patented June 26, 1934 PATENT OFFICE LOCKING MEANS FOR VHATCHCOVERS Joseph William Isherwood and William Isher- Wood, Chislehurst,England Application December S, 1932, Serial No. 646,338 In GreatBritain February 16, 1932 -18 Claims.

'This invention relates te means for locking or jamming movable memberstogether against movement and is particularly suitable for locking hatchcover sections such as disclosed in our U. S. Letters Patent No.1,679,526 granted August 7, 1928 entitled Hatch cover.

Locking or jamming means according to the present invention comprises anexpander device adapted to be inserted between adjacent members to belocked or jammed together, said device comprising a pair or strips andmeans for moving the strips away from one another, whereby the membersare caused to jam one against the other.

The means for moving the strips away from one another preferablycomprises co-operating cam surfaces or wedges which interengage so as totransmit movement imparted to the expander device in both directions (i.e. the strips are moved towards and away from one another). Movement ofthe expander device may for example be obtained by screw and nut, or camgear.

It is obvious that the strips can be made of sectional material of anysuitable shape, i. e. the strips may be of plain plate, rolled section,either half round, angles or flat, or they may be plate anged on one orboth edges.

Referring to the accompanying drawings forming a part of thisspecification and in which like characters designate like parts in allthe views,-

Fig. 1 is a plan View of a hatch, with sectional covers of differenttypes shown tted in the right hand half;

Fig. 2 is a diagrammatic representation of a longitudinal section of thehatch shown in Fig. 1;

Fig. 3 is a diagrammatic representation of a transverse section of saidhatch;

Fig. 4 is a diagrammatic representation of a transverse section of saidhatch with the sectional covers removed and showing a transverse 40 webin elevation;

Fig. 5 is a detail vertical sectional view illustrating a means foractuating one form of expander device;

Fig. 6 is a detail top plan View of the parts 45 shown in Fig. 5;

Fig. 7 is a detail top plan View of an expander device disposed atintervals across the hatch;

Fig. 8 is a diagrammatic cross sectional view 50 through the expanderdevice shown in Fig. 6;

Fig. 9 is a detail sectional View illustrating the expander device andits cooperating T bar for locking the cover sections in place;

Fig.. 10. is a. detailA sectional view taken transversely of a T barillustrating the manner of securing cover sections;

Fig. 1l is a detail elevation partly in section illustrating theconnection between a T bar and a movable member of the expander device;

Fig. 12 is a top plan view of the parts shown in Fig. 1l;

Fig. 13 is a top plan view partly in section of a screw and nut form ofexpander device;

Fig. 14. is a sectional view taken transversely of the expander deviceshown in Fig. 13;

Fig. 15 is a top plan View of a cam type ci expander device;

Fig. 16 is a transverse sectional View of the cam expander shown in Fig.15;

Fig. 17 is a top plan View of an expander de vice which is a modicationof the construction shown in Fig. 6;

Fig. 18 is a vertical sectional View taken as on the line 18-18 of Fig.17 and looking in the 75 direction of the arrows;

Fig. 19 is a transverse sectional View taken as on the line 19-19 ofFig. 17 and looking in the direction of the arrows;

Fig. 20 is a transverse sectional view taken as 3()v on the line 20-20of Fig. 17 and looking in the direction of the arrows;

Fig. 21 is a transverse sectional view taken as on the line 21-21 ofFig. 17 and locking in the direction of the arrows;

Fig. 22 is a top plan View of the expander device of Fig. 17 with amodied form of associated movable members;

Fig. 23 is a vertical sectional View taken asl on the line 23-23 of Fig.22 and looking in the direction of the arrows;

Fig. 24 is a transverse sectional View taken as on the line 24--24 ofFig. 22 and looking in the direction of the arrows;

Fig. 25 isk a transverse sectional view taken as on the line 25-25 ofFig. 22l and looking in the direction of the arrows; and

Fig. 26 is a transverse sectional view taken as on the line 26-26 ofFig. 22 and lookingin the direction of the arrows.

One form of the invention as applied to-locking of hatch cover sectionsis. illustrated in Figures 1 to 12 of the; drawings of which Figure 1 isa plan of a hatch, the right hand' half of which is covered byindependent and removable hatch cover 105 sections, the left handhalfhaving the sections and securing bars removed, they cover platel of theexpander bar being partly broken away'to` illustrate the arrangement ofwedgesandactuat.- ingdevicefforthe side. strips of the` expander bar.110

Figure 2 is a longitudinal section and Figure 3 a section through theright hand bay of the hatch shown in Figure l, dierent types of sectionsbeing shown, Figure 4 is a part section through one of the webs shown inFigure 1. Figures 5 to l2 are detail views of the arrangement shown inFigures 1 to 4. Figures 13 to 16 are detail views of diierent forms ofexpanders, and Figures 17 to 26 are modications of the expanderconstrue'- tion shown in Figures 1 to 12.

Referring to Figures 1 to 12 the hatch cover is formed by a plurality ofsections l, which may, as shown in Figures l and 3, be either formedwith grooves or corrugations or With plane surfaces, the corrugatedconstruction being illustrated on the left hand half of Figure 3 and thesecond bay of Figure l, and the plane construction being illustrated onthe right hand half of Figure 3 and in the rst bay of Figure 1. Thesehatch sections are locked in position by T shaped securing bars 8 theflanges or" which overlie reduced ends 9 formed on the hatch sections(see Figure l0) the securing bars being arranged. over one or more hatchwebs 23 which support the cover sections, said webs being fitted eithertransversely or longitudinally as desired.

The bars are provided at their ends with dovetail pieces 10 which extendinto dovetail slots formed in members 11 secured to strips 12, 13. Thestrip 13 is provided with wedge shaped blocks 14 having dovetailprojections 15 engaging dovetail slots formed in wedge shaped pieces 16secured to a strip 17. The end wedge shaped piece 16 is provided with ascrew threaded hole into which extends a screw threaded rod 18journalled in a bearing 19 and provided with a head 20 for the receptionof any convenient actuating device such as a cranked handle 20. TheT-shaped bars 8 are provided with L-shaped slots 21 into which extendL-shaped projections 22 secured to supporting webs 23 of the hatch andto the coaming. The bar 13 has welded thereto a plate 12 which forms aclosure for the gap between the strips 12, 13 and the sections 1.

In operation when the screw rod 18 is rotated the cooperating wedges 14and 16 cause the strips 12 and 13 to move away from one another, theirmovement being transmitted to the T-shaped securing bars 3 through thedovetail interconnection 10 so that the slots 21 in the T-pieces moveinto locking engagement with the projections 22, whereby the hatchsections are secured in position. The movement of the strips 12, 13 alsocauses the hatch sections to jam against one another thus effectivelysecuring the covers in position.

When it is desired to unlock the hatch sections the screw rod 18 isrotated in the reverse direction and the strips 12, 13 caused toapproach one another' thus enabling the T-shaped securing bars to bemoved and the slots 21 therein moved cut of engagement with theprojections 22. The T-bars can then be lifted and disconnected fromtheir dovetail joint with the strips 12 and 13,

thereby making possible the removal of the cover sections.

In the modied forms shown in Figures 13 and 14, the wedge shaped pieces14 and 16 are replaced by a screw 24 and nut 25, the screw 24 beingsecured against axial movement of the strip 13, and the nut 25 having anannular recess which engages the strip 12, the nut being also providedwith tommy holes or notches 26 to enable the nut to be rotated.

In the modified forms shown in Figures 15 and 16 movement of the strips12, 13 is effected by cams 27 mounted on a shaft 28, the shaft whenrotated in one direction causing the cams to eiiect the separation ofthe strips against the action of springs located in housings 29 and whenrotated in the other direction allowing the strips to be moved towardeach other by the springs.

A further modification is illustrated in Figures 17 to 26 which concernsthe actuation or construction of the strips 12, 13.

Figures 17 to 21 show respectively a plan view, a longitudinal sectionalView, and several transverse sectional views of one form ofconstruction, whilst Figures 22 to 26 show respectively a pian view, alongitudinal View, and several transverse sectional views of a slightlydiierent construction.

Referring to Figures 17 to 21 the actuating strip designated 17 inFigure 6 is replaced by a central rod 30 to which the wedge-shapedpieces 16 are secured. The end wedge-shaped piece is provided, as in thearrangement described with reference to Figures 1 to 12, with a screwthreaded rod 18, the remaining wedge-shaped pieces 16 being actuatedthrough this rod 18 as previously described. The wedge-shaped pieces 16engage with the wedge-shaped pieces 14 which in this modication, aresecured to the strips 12 and 13.

Referring now to Figures 22 to 26 the strips 12 and 13 are madepreferably of hanged plates overlapping at the top, thus forming a coverplate and dispensing with the type of cover plate shown at 12 in Figure20. It is obvious that the top plate can be joggled as in Figures 24 to26, or made flat as indicated in dotted lines in Figure 26. The movementof the strips 12 and 13 away from, or toward each other, may be effectedby wedges as shown on Figures 17 and 22, and as described in relation toFigures 17 to 21, or by screw and nut, cams, springs, or other suitablemeans.

While the invention has been described in the foregoing in conjunctionwith hatch cover sections, it may also be used for other purposes suchfor example as for securing metal plate, angle bars and the like forplaning, drilling, etc. or or compressing paper pulp and like materialand for baling hay or other substances.

It is obvious that those skilled in the art may vary the details ofconstruction as well as arrangements of parts without departing from thespirit of the invention,l and therefore it is not desired to be limitedto the foregoing except as may be required by the claims.

What is claimed isz* l. Means for locking and jamming movable memberstogether against movement comprising an expander device adapted to beinserted between adjacent members along the sides thereof, as well as abar extending transversely from said device on each side thereof, eachbar for securing the ends of the members, said device comprising a pairof strips and means for moving the strips away from one another wherebythe members are caused to jam one against the other, and the bars arecaused to lock the ends of said members.

2. An arrangement as claimed in claim 1 in which the strips areseparated by co-operating wedges.

3. An arrangement as claimed in claim 1 in which the strips areseparated by screw and nut.

4. An arrangement as claimed in claim 1 in which movement is transmittedin both directions.

5. An arrangement as claimed in claim 1, in

which the strips are so shaped as to form a closure plate for theactuating mechanism substantially as described.

6. An arrangement as claimed in claim 1 in which one of the strips isprovided with a closure plate, substantially as described.

'7. In a hatch the combination of a cover comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections; aplate engaging an end of said bar; and means including a second platecontacting said first plate and operating transversely of said bar tomove said bar longitudinally of itself and into locking engagement withsaid sections.

8. In a hatch the combination of a cover comprising a plurality of smallsections; a bar adapted to secure a plurality of said sections; a plateengaging an end of said bar and movable therewith; and means including asecond plate contacting said first plate and operating transversely ofsaid bar to move said bar longitudinally of itself and into lockingengagement with said sections.

9. In a hatch the combination of a cover comprising a plurality of smallsections; a bar adapted to secure a plurality of said sections; andscrew-actuated means disposed in the plane of said sections andoperating transversely of said bar to move said bar into lockingengagement with respect to said sections.

10. In a hatch the combination of a cover comprising a plurality ofsmall sections; arranged. side by side With their ends in alignment; abar adapted to secure the aligned ends of said sec-v tions; andcam-operated means to move said bar into locking engagement with respectto said sections, said means disposed along a side of onev of saidsections and operating in the plane of all of said sections.

l1. In a hatch the combination of a coverI comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections;and means including a spring-tensioned camactuated plate engaging an endof said bar to move said bar into locking engagement with respect tosaid sections.

12. In a hatch the combination of a coverI comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections;and means including a springreturned camactuated plate disposed along aside of one of the sections and engaging an end of said bar to move saidbar into locking engagement with respect to said sections.

13. In a hatch the combination of a cover comprising a plurality ofsmall sections; a plate; a bar adapted to secure a plurality of saidsections said bar readily removable through the provision of a dovetailconnection at one end with said plate; and means operating through saidplate to move said bar into locking' and unlocking engagement withrespect to said sections.

14. In a hatch the combination of a cover comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections; aplate engaging an end of said bar; means including a second platecontacting said rst plate and operating transversely of said bar to movesaid bar into locking engagement with respect to said sections; and aclosure disposed over said means, said closure carried by said firstnamed plate.

15. In a hatch the combination of a cover comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections; aplate engaging an end of said bar; means including a second platecontacting said rst plate and operating transversely of said bar to movesaid bar into locking engagement with respect to said sections; and aclosure disposed over said means, said closure comprising a plate membercarried by said rst named plate.

16. In a hatch the combination of a cover comprising a plurality ofsmall sections; a bar adapted to secure a plurality of said sections; aplate engaging an end of said bar; means including a second platecontacting said first plate .and operating transversely of said bar tomove said bar into locking engagement with respect to said sections; anda closure disposed over said means, said closure comprising an extensionof said first named plate, said extension disposed substantially atright angles to the plane of said plate.

17. In a hatch the combination of a cover :comprising a plurality ofsmall sections arranged in a row; a bar adapted to secure the sectionsthereof in place; a plate attached transversely 'to an end of said barand extending along an end of said rovv; and means to move said platetransversely, causing longitudinal movement of said bar into lockingengagement with said sections, said means comprising a plurality ofelements disposed at intervals along said plate and a mechanismsimultaneously operating said elements upon movement of said plate.

18. In a hatch the combination of a cover comprising a plurality ofsmall sections arranged in plural rows; a bar disposed between tvvoadjacent rows and adapted to secure the sections thereof in place; aplate attached transversely to an end of said bar and extending along anend of a row; and means to move said plate transversely of itself,causing longitudinal movement of said bar into locking engagement Withsaid sections, said means comprising a plurality of elements disposed

